Method for manufacturing footwear last, and footwear last manufactured by the method
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United States of America Patent
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Mar 3, 2015
Grant Date -
Feb 10, 2011
app pub date -
Jun 15, 2010
filing date -
May 3, 2006
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Abstract
Provided is a footwear last, being of a structure where its interior is hollow. The method includes steps of installing a parison for manufacturing a plastic vessel between left/right molds for manufacturing the footwear last, with the left/right molds opened; injecting a last manufacturing material into a tube of the parison; blowing air while closing the left/right molds; molding the material in a temperature of about 400 C to 70° C. and under an injection pressure of about 600 kg/cm2 to 1400 kg/cm2; and completing the last whose interior is hollow.
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